Southwest periodically make flights for further in the future available. They’ve added flights until January 6, 2019. Flights after January 6, 2019 (until March 6, 2019) will be added on June 28, 2018.
Southwest has a pretty good cancellation/refunds policy, depending on the fare you’ve booked you’ll either receive a credit towards a future flight(Wanna Get Away) or cash refund (Business Select or Anytime – returned to credit card if you used one). That means it’s often best to book flights as soon as they become available and periodically check to see if the price has decreased, if it has you can click ‘change flight’.
